Two-Photon Correlation of Photon Pairs: Near Field and Polarization Effects

摘要

The original quantum eraser scheme [Scully and Druehl, Phys. Rev. A 25, 2208 (1982)] is based on the entanglement of the two sequentially and spontaneously emitted photons. We consider the scheme in which the first emitted photon is largely detuned from resonance. We use the Schroedinger equation approach and the Laplace transform method to obtain the Raman Emission Doublet(RED) state vector. An exact analytical expression for the two-photon correlation function is derived in a general form that applies to any polarization of the two detectors located at any position, including the near field regime where the distances are comparable to the wavelengths of the photons. Frequency dependent refractive indexes of the RED photons are also included.